Effects of Heat Stress on Water Consumption, Feed Intake and Milk Production of Crossbred Dairy Cows Kept in Nghia Dan District, Nghe An Province in Summer

Abstract

An experiment was conducted to determine effects of heat stress on water consumption, feed intake and milk production in 6 crossbred dairy cows of F₁ (50% HF) and 6 of F₂ (75% HF) in the summer season in Nghia Dan district, Nghe An province. Results showed that heat stress significantly effected water consumption, feed intake and milk production of the cows.  As THI increased  the consumption of water was increased, but feed intake and milk production were decreased. Feed intake and milk production had negative correlations while the amount of  water consumed had positive correlation with THI. In comparison with F₁,  F₂ cows were more affected